Roronoa Zoro (ロロノア・ゾロ?, named after François l'Olonnais) is a swordsman who uses up to three swords simultaneously, holding one in each hand and a third in his mouth.[ch. 3, 5, 28] To fulfill a promise to Kuina, his deceased childhood rival, he aims to replace "Hawk Eye" Mihawk as the world's greatest swordsman.[ch. 5, 50] Traveling the seas in search of Mihawk and making a living as a bounty hunter, he becomes infamously known as "Pirate Hunter" Zoro (海賊狩りのゾロ?Kaizoku-Gari no Zoro). Eventually, he comes into conflict with Helmeppo. To prevent the harm of innocent civilians, Zoro allows himself to be incarcerated temporarily, while Helmeppo plots to have him killed. Zoro is saved from execution by Luffy in exchange for becoming his first crewman. At that point, Zoro makes it clear that he would turn on his captain if he ever stepped between him and his dream.[ch. 2–6] However, Zoro grows fond of his crew and after several defeats in their defense, his priorities change and he convinces Mihawk to take him on as a student.[ch. 51f., 485, 597]

In the anime television series, his voice actor is Kazuya Nakai.[1] In the 4Kids English adaptation, his name is spelled Roronoa Zolo, and he is voiced by Marc Diraison.[2] In the Funimation English adaptation, his voice is supplied by Christopher R. Sabat.